针对飞行器在飞行状态下需要对外部环境进行识别和参数记录任务，提出基于FPGA的高速数据采集存储方案。通过对AD9254芯片前端电路进行合理设计，实现其对视频信号的高速采集，采样速率为132 Msample/s。利用FPGA静态仿真实现逻辑控制的修正，解决了因内部时钟传输占空比失真而导致误码产生的问题。数据存储采用二级流水线的操作方式，写速率可达62 Mbyte/s。系统设备经地面联试试验已成功应用于工程实践，具有较高的可靠性和稳定性。%For the mission of aircraft to identify the external environment and record the parameters,a method of the high-speed data acquisition and storage solutions was proposed based on FPGA. Through the reasonable circuit de-sign of the AD9254,realized the high-speed acquisition of the video signal,the sampling rate is 132 Msample/s. Correcting the logic control of FPGA by the use of static simulation,and the problem of wrong data caused by the distortion clock in FPGA was solved. Two-stage pipeline of operation would be used at the storage of data,it can be written at a speed of 62 Mbyte/s. This system has been tested successfully in an engineering practice with high reli-ability and stability.
展开▼
